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Werk #23047: Host properties: no crash on unknown site

Component Setup
Title Host properties: no crash on unknown site
Date Nov 5, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
3.0.0b1
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p19
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The reachability check next to the network address fields in the properties of a host could fail with an internal error when the host was assigned to a site that is no longer configured. The same applied to the agent and SNMP connection tests and to the lookup of the agent receiver port.

The reachability check and the connection tests now report "Unknown site" in this case, and the agent receiver port falls back to the default port.

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